SOC 1500 Lecture Notes - Lecture 5: Central Tendency, Interquartile Range, Descriptive Statistics
12 Oct 2018
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Document Summary
Measures of central tendency and dispersion chapter 2 and 3. Outline: first review types of variables and descriptive statistics, then explore measures of central tendency and dispersion, mode, median, mean. Continuous: dis(cid:272)rete: varia(cid:271)le are (cid:373)easured i(cid:374) u(cid:374)its that" (cid:272)a(cid:374)(cid:374)ot (cid:271)e su(cid:271)divided (cid:894)ge(cid:374)der(cid:895, continuous: variables are measured in a unit that can be subdivided infinitely (age) Variables: levels of measurement: scores of variables are measured on three different levels (noir, nominal: scores are labels only (not numbers, ordinal: sores have some numerical quality and can be ranked (how much you like school) The concept of dispersion: variety diversity, amount of variation between scores, greater the dispersion of a variable, the greater the range of scores and the greater the differences between scores. If n is odd, the median is the score of the middle case. If n is even, the median is the average of the scores of the two middle cases.
